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Finding the Fourth Proportional to 904.23, 1,355.31 and 356.04

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Solution

The fourth proportional to 904.23, 1,355.31 and 356.04 is: 533.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.23 : 1,355.31 = 356.04 : x
  2. Step 2: Convert to fraction form
    904.23/1,355.31 = 356.04/x
  3. Step 3: Cross multiply
    904.23x = 1,355.31 × 356.04
  4. Step 4: Simplify right side
    904.23x = 482,544.57
  5. Step 5: Solve for x
    x = 482,544.57/904.23
  6. Step 6: Final answer
    x = 533.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.